Vat registration number

Hi All,

unfortunately in one of my PO printing

VAT # is picking incorrect.

when i check in company code under which PO was created here VAT# was wrong so i update VAT# in company code with correct VAT#.

after all chages in DEV when i tried to created new PO under same company code so now VAT# is printing correct.

but in previous PO still wrong VAT# is showing which is obvious so now

is there any way to update previous PO or i have to create new one?

Amit.